Retrieving deleted form submission

I deleted some submissions of a form I didn't want to. I didn't see a trash file to retrieve them. How can I get those back or are they gone forever? 

Unfortunately, we cannot recover deleted submissions.

You may try to get the submission data back by using the notification email and exporting it as excel file.

You can view your notification logs in your account history.

Guide:https://www.jotform.com/help/293-How-to-View-All-Your-Form-Email-History

Then we can use the Import app to import back the data into your form submission.

https://www.jotform.com/help/308-Import-App-Easily-Import-Your-Excel-or-CSV-Data-into-JotForm

Hope this information helps.